
public class Test {

	
	static String test(String s){
		s+="abc";
		
		return s;
	}
	
	public static void main(String[] args) {
		StringBuilder bd = new StringBuilder();
		
		bd.append("abcdef");
		
		bd.delete(bd.length()-2, bd.length());
		
		System.out.println(bd.toString());
	}
}
